Laser hair removal is based on the theory of selective photothermolysis. Melanin is abundant in the hair follicle and hair shaft and is distributed between the cells of the hair bulb matrix and can also be transferred to the structures of the hair shaft. The laser can precisely and selectively target melanin to destroy the hair follicle stem cells in the bulge of the outer hair root sheath and/or the dermal papillae at the base of the hair follicle. The melanin, having absorbed the laser energy, increases in temperature, thereby destroying the surrounding hair follicle tissue and removing the hair. Since the epidermis shares a similar absorption spectrum with the melanin in the hair follicle, skin cooling is necessary for safe hair removal treatments, which is especially important for patients with darker skin tones. Sun protection should be observed one week before and two weeks after the hair removal treatment. Hair removal areas should not be plucked, waxed and electrolysis removed two weeks before the treatment. The laser hair removal method can be used in almost all parts of the body, and the reasonable treatment energy can be used without hurting the skin and any surrounding tissues. It is suitable for removing excess hair in any part of the body, such as axillary hair removal, facial hair removal, lip hair removal, front and back hair removal, front and back hair removal, bikini hair removal, limb hair removal, etc. It is the most advanced once and for all hair removal method for both men and women.